Part of that was that Microsoft claimed that IE was an essential part of the operating system and couldn't be separated. This would mean if they continued with this behaviour that even if Chrome was bundled with Sony systems, and made the default browser, the blue E would still be hanging around the desktop.
Chrome isn't being locked in to Sony systems, it's being installed as a suggestion, much like VAIO and HP and Toshiba and every other PC manufacturer does with the annoying crapware that you get with your computer (I'm talking Norton trials and the likes).
I'm a big fan of Chrome, so not completely impartial in this, but at least now other browsers can be bundled with Windows, and easily replaced if you have another preference.
Troll because I may have fallen victim to one.